Available Shapes
UNS S31254 Stainless Steel
NAS 185N (SUS 312L, UNS S31254) is a high corrosion resistant austenitic stainless steel with high nickel, high chromium, high molybdenum alloy design, and provides excellent corrosion resistance in severe corrosion environments such as high-temperature seawater. Depending on the environment, this stainless steel offers high economy combined with corrosion resistance comparable to that of Nickel alloy and pure titanium.
Related Specifications
6 Mo 31254 254SMO F44 1.4547 ASTM A182
ASTM A479 ASTM A276 EN10272 ASME SA479
Applications
Analysis
Corrosion Resistance
Typical Mechanical Properties
Applications
Seawater handling systems
Desalination plant equipment
Paper and pulp
Flue gas desulphurisation units in power plants
Chemical processing
Control and instrumentation tubes
Analysis
| Carbon | 0.02% max | Chromium | 19.50-20.50% |
| Manganese | 1.00% max | Nickel | 17.50-18.50% |
| Silicon | 0.70% max | Molybdenum | 6.00-7.00% |
| Phosphorous | 0.03% max | Copper | 0.50-1.00% |
| Sulphur | 0.01% max | Nitrogen | 0.18-0.25% |
Corrosion Resistance
The alloy can provide excellent resistance to stress corrosion cracking allowing tube cold formingand may be used without the necessity to re-anneal at testing up to 120°C.
Typical Mechanical Properties
| Temp °C | Density Kg/m³ | Mean Coefficient of Thermal Expansion | Modulus of Elasticicy kg/mm | Electrical Resistivity Ωmm²/m | Specific Heat J/kg ºC |
|---|---|---|---|---|---|
| 20 | 8.0 | 16×10-6 | 20000 | 0.5 | 500 |
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